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Free Text Readability Consensus Calculator


Our free Text Readability Consensus Calculator takes a sample of your writing and calculates the number of sentences, words, syllables, and characters in your sample. Our program takes the output of these numbers and plugs them into 7 popular readability formulas. These 7 readability formulas (see below) will help you find out the reading level and grade level of your materials and help you to determine if your audience can read your materials.

(Note: We also have separate readability tools to calculate grade levels using the Fry Graph, Raygor Estimate Graph, Spache Formula, and New Dale-Chall Formula, located here: Free Readability Calculators and Text Tools).

Directions: Paste in a sample of text and click "CHECK TEXT READABILITY." A sufficient sample size consists of 4-5 full sentences; approximately 200 - 500 words total. For larger texts, such as books, pull 1-2 sample sizes from each chapter. (Note: Our free readability assessment tool limits sample size to 600 words. Sample sizes over 600 words are automatically truncated.)


Paste sample of plain text here. Your sample must be between 150-600 words. Thank you! :)

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Our free readability formula tool will analyze your text and output the results based on these readability formulas. Our tool will also help you determine the grade level for your text.

1. The Flesch Reading Ease formula will output a number from 0 to 100 - a higher score indicates easier reading. An average document has a Flesch Reading Ease score between 6 - 70. As a rule of thumb, scores of 90-100 can be understood by an average 5th grader. 8th and 9th grade students can understand documents with a score of 60-70; and college graduates can understand documents with a score of 0-30.

2. The Flesch-Kincaid Grade Level outputs a U.S. school grade level; this indicates the average student in that grade level can read the text. For example, a score of 7.4 indicates that the text is understood by an average student in 7th grade.

3. The Fog Scale (Gunning FOG Formula) is similar to the Flesch scale in that it compares syllables and sentence lengths. A Fog score of 5 is readable, 10 is hard, 15 is difficult, and 20 is very difficult. Based on its name, 'Foggy' words are words that contain 3 or more syllables.

4. The SMOG Index outputs a U.S. school grade level; this indicates the average student in that grade level can read the text. For example, a score of 7.4 indicates that the text is understood by an average student in 7th grade.

5. The Coleman-Liau Index relies on characters instead of syllables per word and sentence length. This formula will output a grade. For example, 10.6 means your text is appropriate for a 10-11th grade high school student.

6. Automated Readability Index outputs a number which approximates the grade level needed to comprehend the text. For example, if the ARI outputs the number 3, it means students in 3rd grade (ages 8-9 yrs. old) should be able to comprehend the text.

7. Linsear Write Formula is a readability formula for English text, originally developed for the United States Air Force to help them calculate the readability of their technical manuals. Linsear Write Formula is specifically designed to calculate the United States grade level of a text sample based on sentence length and the number words used that have three or more syllables.

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